Pardon my phraseology, but its safe (ha ha) to say that most of us are presented with scams to combat on a near daily basis. Spam filter (aka junk mail filtering) attempts to separate many of the scams from our e-mail inboxes, but some will still get through to you.
Scammers are now attempting to make pixel perfect scam emails and scam websites that visually look almost identical to the original site they're pretending to be. As a general rule, assume everything questionable is a scam. Sometimes, even stuff that looks legit, should be considered that its a scam.
It takes learned experiences to perfectly tell the difference, and that's way beyond the scope of this website, so I'll let you research that on your own. Pick the brains of your local computer geek.
Norton Security Premium provides secure PC backup, family featues and powerful virus protection for your PC, Mac, smartphone and tablets. Surf, bank, game and shop online more securely.
If a scam email or scam website manages to steal your password, that password becomes compromised and hopefully you're taking my advice and not using that password on any other websites. No one wants to fall victim to a scam, but its even worse if this happens and now a dozen other sites or apps you use could be compromised. Please use unique passwords right away!
As far as software you can install on your computer or mobile device, I'd suggest you read the most recent reviews as this software is constantly changing over the course of every year. Twenty years ago, the common names were Norton and McAfee, and they're still putting out new software. But now you can get free software as well. Not all software is equal, check reviews to see which will work best for you.
You're going to need to keep your security software up-to-date. Software that expired two months ago isn't going to protect you from the new virus or malware of today and tomorrow. Update often!